1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5  6 namespace LambdaSample 7 { 8     class PRogram 9     {10         static void Main(string[] args)11         {12             int[] myIntArray = { 1,2, 3, 4, 5 };13             //累加器計算數組總和 14             int result = myIntArray.Aggregate((paramA, paramB) => paramA + paramB);15             int result1 = myIntArray.Aggregate<int>((paramA, paramB) => paramA + paramB);16             int result2 = myIntArray.Aggregate<int, int>(0, (paramA, paramB) => paramA + paramB);17             //遞歸計算數組總和18             int result3 = count(5);19             Console.WriteLine("The Result is: " + result);20             Console.WriteLine("The Result1 is: " + result1);21             Console.WriteLine("The Result2 is: " + result2);22             Console.WriteLine("The Result3 is: " + result3);23 24             string[] myStrArray = { "Admin", "Change", "ByPage" };25             //字符串數組拼接 何問起26             string strResult = myStrArray.Aggregate((paramA, paramB) => paramA + " " + paramB);27             //字符串數組字符串總長度計算28             int result4 = myStrArray.Aggregate<string, int>(0, (a, b) => a + b.Length);29             //字符串數組拼接2，增加字符串"Some curries: "30             string strResult1 = myStrArray.Aggregate<string, string>("Some curries: ", (a, b) => a + " " + b);31             //字符串數組字符串總長度計算2  hovertree.com32             int result5 = myStrArray.Aggregate<string, string, int>("Some curries: ", (a, b) => a + " " + b, a => a.Length);33             Console.WriteLine("The StrResult is: " + strResult);34             Console.WriteLine("The Result4 is: " + result4);35             Console.WriteLine(strResult1);36             Console.WriteLine("The Result5 is: " + result5);37             Console.ReadKey();38         }39 40         static int count(int n)41         {42             if (n == 1)43             {44                 return 1;45             }46             return n + count(n - 1);47         }48     }49 }